PRLR rs13436213: What Your Genotype Means
The rs13436213 variant is a specific genetic change located within the PRLR gene, which encodes the prolactin receptor. Research has identified this variant as being significantly linked to an increased risk of polycystic ovarian syndrome (PCOS).
What each genotype means
Increased PCOS risk association
Research indicates that the C allele at this position in the PRLR gene is associated with an increased risk of polycystic ovarian syndrome (PCOS) under recessive models. If you carry this genotype, it suggests a potential genetic contribution to your reproductive health profile, though functional studies are still needed to confirm the exact biological mechanism. Please discuss any concerns regarding reproductive health or symptoms with your healthcare provider.
Specific population frequency data for this genotype is not currently established in large-scale public databases.
Heterozygous genotype
This genotype contains one copy of the C allele, which has been linked to PCOS risk in recessive models. Because the association is observed primarily in a recessive context, carrying one copy may have a different impact than carrying two. Consult with a medical professional to interpret this finding in the context of your overall health and family history.
Specific population frequency data for this genotype is not currently established in large-scale public databases.
Baseline risk profile
This genotype does not carry the C allele identified in research as being associated with an increased risk of PCOS. This suggests that your genetic profile at this specific location does not contribute to the risk patterns observed in studies of the PRLR gene. As with all genetic findings, this should be viewed as one small piece of your overall health picture.
Specific population frequency data for this genotype is not currently established in large-scale public databases.
Understanding the rs13436213 Variant
The rs13436213 variant is a single nucleotide polymorphism (SNP) located within the PRLR gene. In genetics, a SNP represents a variation at a single position in the DNA sequence among individuals. This specific variant is classified as intronic, meaning it resides within an intron—a non-coding region of the gene that is removed during the process of creating a functional protein. While introns do not provide the direct instructions for building proteins, they often contain regulatory elements that influence how much of a protein is produced or when it is expressed. Because rs13436213 is located in this regulatory space, researchers investigate whether it might alter the normal function of the prolactin receptor by affecting gene expression levels in specific tissues.
The Role of the PRLR Gene
The PRLR gene provides instructions for making the prolactin receptor, a protein that sits on the surface of cells and responds to the hormone prolactin. Prolactin is primarily known for its role in milk production, but it also plays a critical part in various physiological processes, including metabolism, immune system regulation, and reproductive health. The receptor belongs to the cytokine receptor family and helps transmit signals from the outside of the cell to the inside, triggering pathways that regulate cell growth and function. In the ovaries, proper prolactin signaling is essential for normal reproductive cycles. Disruptions in this signaling pathway, whether through genetic variation or other factors, can impact ovarian function, which is why the PRLR gene is a subject of interest in studies concerning reproductive health conditions.
Research and PCOS Association
The association between rs13436213 and polycystic ovarian syndrome (PCOS) was highlighted in a 2023 study involving Italian families. Researchers examined 40 variants within the PRLR gene and identified rs13436213, along with another variant, as being significantly linked to the risk of developing PCOS. The evidence for this association is currently considered moderate, as it stems from specific family-based studies rather than large-scale, multi-ethnic genome-wide association studies. Bioinformatics analysis suggests that this variant may intersect with regions of the genome that regulate gene expression in uterine tissue, potentially leading to reduced PRLR activity. While these findings provide a compelling link, the scientific community emphasizes that further functional studies are required to confirm the exact biological mechanism by which this variant contributes to PCOS risk.
Interpreting Your Genetic Information
It is important to understand that having a specific genotype at the rs13436213 position does not mean an individual will develop PCOS. PCOS is a complex, multifactorial condition influenced by a combination of genetic, environmental, and lifestyle factors. Genetic variants like rs13436213 are typically associated with a small increase in relative risk rather than acting as a direct cause of the condition. If you are concerned about reproductive health or symptoms associated with PCOS, such as irregular cycles or hormonal imbalances, the most appropriate step is to consult with a healthcare professional or a reproductive endocrinologist. They can provide a clinical evaluation, which is far more informative than genetic testing alone. Never use information about a single SNP to make medical decisions or to self-diagnose.
How common is this variant?
Specific population frequency data for the rs13436213 variant is not widely documented in major public databases. The association with PCOS has been observed in specific study cohorts, but broader global frequency remains to be established.
Frequently asked questions
Does having the rs13436213 variant mean I have PCOS?
No. Genetic variants are only one piece of a complex puzzle. PCOS is diagnosed based on clinical criteria, such as hormone levels and ultrasound findings, not by the presence of a single genetic marker.
What is the PRLR gene?
The PRLR gene encodes the prolactin receptor, which is a protein that helps cells respond to the hormone prolactin. This receptor is involved in many bodily functions, including reproduction and metabolism.
Should I get tested for this SNP?
Genetic testing for this specific SNP is not a standard part of medical care for PCOS. If you have concerns about your reproductive health, you should speak with a doctor who can order appropriate diagnostic tests.
Is the link between rs13436213 and PCOS proven?
The link is supported by recent research, but it is considered a novel finding that requires more study. Scientists need to conduct larger, diverse studies to confirm the association and understand the underlying biology.
Sources & further reading
Educational information only, last refreshed 10/10/2026. Not medical advice — these associations describe population statistics, not individual predictions.
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